Automatic fire-alarm.



'PATENTED JUNE 16, 1903.

D. BEAULIEU.

AUTOMATIC FIRE ALARM. APPLIOATION FILED D30. 29, 1902,

NO MODEL.

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Attorneys gvvi/Vitnesses:

UNITED STATES Patented June 16, 1903.

PATENT OFFICE.

AUTOMATIC FIRE-ALARM.

SPECIFICATION forming part Of Letters Patent No. 730,864, dated June 16, 19Q3.

Application filed December 29,1902. Serial No. 136,894. (No model.)

To all whom it may concern:

Be it known that I, DAMASE BEAULIEU, a subject of the King of Great Britain, residing at St. Ulric, county of Matane, Province of Quebec, Canada, have invented certain new and useful Improvements in Automatic Fire- Alarms; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to fire-alarms, and" especiallyto that class calledautomatic. Itis intended to be placed in exposed positions in the interior of a room or house at points where it would probably be reached by the flames and causes an alarm to be given when this occurs.

The invention consists in a certain construction and combination of parts to be more fully described hereinafter and definitely set forth in the claims.

In the drawings, Figure 1 represents a plan. Fig. 2 represents a side elevation, which is partially in section,as will appear. Fig. 3 is a bottom plan. Fig. 1 is a view, diagrammatic in its nature, showing my invention inelectric circuit with an alarm or bell, my invention being shown in this figure in longitudinal vertical section.

Throughout the drawings and specification the same reference-numerals refer to the same parts.

Referring more particularly to the parts, 1 represents a base or plate which is adapted to be attached to the wall or a similarsupport by means of suitable fastening devices, such as screws 2. It is provided on its inner face with a shallow recess 3, substantially as shown, and a deep central recess 4:. On each side of this central recess are provided contact-plates 5, which may be countersunk into the base, as shown. They extend beyond the edges of the recess 4:, projecting toward each other, as shown, being secured in place by screws 6, which screws constitute also binding-posts for the electric-circuit wire 7, which circuit is supplied with current from a suitable battery 8 and includes an alarm-bell 9. From this arrangement it should appear that if a metallic connection between the tips of the contact-plates 5 were made the circuit 7 would become closed and the-alarm-bell 9 would be rung. I shall now describe the means for automatically closing this circuit when a flame comes in contact with my device. To this end there is provided a bore 10, connecting with the bottom of the central recess 4, in which bore is guided a short bolt or stud 11, to which is attached at its inner extremity a metallic head 12, and a helical spring 13, pressing against the lower side of this head, constrains the same in the direction of the aforesaid contact-plates 5. There are provided, however, two horns or standards 1 L, preferably formed integrally with the base 1, which horns carry between them a cord 15, which passes through an eye 16, mounted in the outer extremity of the stud 11. This cord restrains the spring 13, normally maintaining the stud in the position in which it is shown in Fig. 4:. The cord 15 may be attached to one of the horns in a simple manner, as with an eye 17. Its other extremity, however, attaches to a tapered plug 18, mounted, as shown, in the extremity of the opposite horn. By turning this plug with the fingers and forcingit' firmly into its seat the slack of the cord 15 may be taken up, so that the stud 11 will be maintained as shown, as will be readily understood. The cord 15 is of course formed of some combustible or vegetable material and is adapted to be immediately consumed by the flame when it comes in contact with it, releasing the stud 11, so that its head'12 makes contact with the contact-plates 5 in the manner described, causing the ringing of the alarm-bell 9, as stated.

While I have shown in the accompanying drawings the preferred form of my invention, it will be understood that I do not limit myself to the precise form shown, for many of the details may be changed in form or position without afiecting the operativeness or utility of my invention, and I therefore reserve the right to make all such modifications as are included within the scope of the following claims or of mechanical equivalents to the structures set forth.

Having described my invention, what I consider as new, and desire to secure by Letters Patent, is

1. The combination of abase-block adapted to be secured to and rest upon the outer surface of a wall and recessed on its underside, a pair of contact-pieces forming terminals secured to said block at opposite sides of said recess and within the latter, whereby the conductors can be led to said terminals without defacing the wall, said block having a hole therethrough opposite the ends of said contact-pieces, a stud reciprocably mounted in said hole, a compression-spring mounted on said stud and tending to force the latter into contact with the contact-pieces, a pair of projections on said base on opposite sides of said stud, and a cord attached to said projections and passing through an eye in said stud and holding the same in check, whereby the burning or melting of said cord will release said stud.

2. In a device of the class described, in combination, a plate adapted to be secured to a support and having a recess on the inner face thereof, contact plates carried Within said recess, said plate having a deeper recess between said contact-plates, a metallic member movably mounted within said deeper recess and which may connect said contactplates, a stud connecting with said metallic member and projecting from the outer face of said plate, said plate having a pair of standards projecting outwardly from the outer face thereof, a cord connecting said standards and attaching to the outer extremity of said stud, and means for adjusting said cord.

3. In a device of the class described, in combination, a base-plate having a recess on the inner face thereof and a deeper central guided within said bore, a metallic head carried by said stud, a spring carried in said bore and thrusting against said head, constraining the same toward said contact-plate, an eye carried by the outer extremity of said stud, and a cord attached to said base-plate and passing through said eye, said cord being of combustible material.

4. In a device of the class described, in combination, a base-plate having a recess on the inner side thereof, contact-plates countersunk within said recess, a deeper recess between said contact-plates, there being a bore connecting therewith, a stud mounted in said bore, a metallic head attached to said stud, a helical spring surrounding said stud and thrusting against the under side of said head, an eye mounted in the outer extremity of said stud, horns projecting from the inner face of said base-plate, a cord carried therebetween and passing through said eye, and a tapered plug carried by one of said horns and to which said cord is attached, said cord being of combustible material.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

DAMASE BEAULIEU.

Witnesses:

L. E. DANJoU, J. E. GA'GNON. 

